[API reference](https://evolu.dev/docs/api-reference) › [@evolu/common](https://evolu.dev/docs/api-reference/common) › [Type](https://evolu.dev/docs/api-reference/common/Type) › WellFormedString

```ts
const WellFormedString: wellFormed(String);
```

Defined in: [packages/common/src/Type.ts:7672](https://github.com/evoluhq/evolu/blob/bc4578a260dd15d5bbf94b83765ca05984d194cb/packages/common/src/Type.ts#L7672)

A [String](https://evolu.dev/docs/api-reference/common/Type/variables/String) of well-formed Unicode text.

See [wellFormed](https://evolu.dev/docs/api-reference/common/Type/variables/wellFormed).

### Example

```ts
import { assertErr, assertOk, WellFormedString } from "@evolu/common";

assertOk(WellFormedString.fromUnknown("😀"), "😀");
assertOk(WellFormedString.fromUnknown(""), "");
assertErr(WellFormedString.fromUnknown("\uD83D"));
```